In a journal bearing, the load on the bearing is __________ to the axis of the journal.

In an oil lubricated journal bearing, the coefficient of friction between the journal and the bearing

A

Remains constant at all speeds

B

Is minimum at zero speed and increases monotonically with increase in speed

C

Is maximum at zero speed and decreases monotonically with increase in speed

D

Becomes minimum at an optimum speed and then increases with further increase in speed

In a partial journal bearing, the angle of contact of the bearing with the journal is

A

120°

B

180°

C

270°

D

360°

In a full journal bearing, the angle of contact of the bearing with the journal is

A

120°

B

180°

C

270°

D

360°

According to parallel axis theorem, the moment of inertia of a section about an axis parallel to the axis through center of gravity (i.e. $${I_{\text{P}}}$$) is given by (where, A = Area of the section, $${I_{\text{G}}}$$ = Moment of inertia of the section about an axis passing through its C.G. and h = Distance between C.G. and the parallel axis.)

A

$${I_{\text{P}}} = {I_{\text{G}}} + {\text{A}}{{\text{h}}^2}$$

B

$${I_{\text{P}}} = {I_{\text{G}}} - {\text{A}}{{\text{h}}^2}$$

C

$${I_{\text{P}}} = \frac{{{I_{\text{G}}}}}{{{\text{A}}{{\text{h}}^2}}}$$

D

$${I_{\text{P}}} = \frac{{{\text{A}}{{\text{h}}^2}}}{{{I_{\text{G}}}}}$$

S₁:Since the sixties there has been an increasing interest in neurophysiology, which deals with the neural bases of mental activity and behaviour.
P :It has format which is very similar to that of Brain and Language, a sister journal.
Q :Since then, a number of journals devoted entirely to this area of research have appeared.
R :Before the 1960's when this field was the concern of a small number of investigators, research articles were scattered in various neurological journals.
S :Brain and cognition is one such journal.
S₆:So far the journal has published the mixture of articles including reports and investigations.

The Proper sequence should be:

A

RQSP

B

QRSP

C

QSPR

D

RSPQ

If p = bearing pressure on projected bearing area, Z = absolute viscosity of lubricant and N = speed of journal, then the bearing characteristic number is given by

A

$$\frac{{{\text{ZN}}}}{{\text{p}}}$$

B

$$\frac{{\text{p}}}{{{\text{ZN}}}}$$

C

$$\frac{{\text{Z}}}{{{\text{pN}}}}$$

D

$$\frac{{\text{N}}}{{{\text{Zp}}}}$$

A journal bearing is a ______ contact bearing working on the hydrodynamic lubrication and which supports load in____ direction.

A

Sliding, Axial

B

Rolling, Radial

C

Sliding, Radial

D

Rolling, Axial

In order to have a connecting rod equally strong in buckling about X-axis and Y-axis, the moment of inertia about X-axis should be __________ the moment of inertia about Y-axis.

A

Equal to

B

Twice

C

Three times

D

Four times

When the length of the journal is equal to the diameter of the journal, then the bearing is said to be a

A

Short bearing

B

Long bearing

C

Medium bearing

D

Square bearing

A rotor which is balanced statically but not dynamically is supported on two bearings L apart and at high speed of the rotor, reaction on the left bearing is R. The right side of the bearing is shifted to a new position 2L apart from the left bearing. At the same rotor speed, dynamic reaction on the left bearing in the new arrangement will

A

Remain same as before

B

Become equal to 2R

C

Become equal to $$\frac{{\text{R}}}{2}$$

D

Become equal to $$\frac{{\text{R}}}{4}$$

In a journal bearing, the load on the bearing is __________ to the axis of the journal.

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